package com.xiaofeng.subject.domain.util;

import com.alibaba.fastjson.JSON;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;

/**
 * @Author: chc
 * @Date: 2024/03/01/17:30
 * @Description:
 */
@Component
public class CacheUtil<K,V> {


    private Cache<String,String> localCache =
            CacheBuilder.newBuilder()
                    .maximumSize(5000).expireAfterWrite(10, TimeUnit.SECONDS).build();


    public List<V> getResult(String cacheKey,Class<V> clazz,
                               Function<String,List<V>> function) {
        List<V> resultList = new LinkedList<>();
        String content = localCache.getIfPresent(cacheKey);
        if (StringUtils.isNotBlank(content)){
            resultList = JSON.parseArray(content, clazz);
        }else {
            resultList = function.apply(cacheKey);
            if (!CollectionUtils.isEmpty(resultList)){
                localCache.put(cacheKey,JSON.toJSONString(resultList));
            }
        }
        return resultList;
    }

    public Map<K,V> getMapResult(String cacheKey, Class<V> clazz,
                             Function<String,List<V>> function) {
       return  new HashMap<>();
    }


}
